Carbureter.



J. Muacma.

CARBURETER. I APPLICATION FILED APR. 10. 1913.

' "Patnted Nbv. 20, 191

ZSHEETS-SHEET 1.

oaccoo Qauunuqo l h. h llwm lwtquw 1 M1110!) engines by means of which an explos ve;

"extra air valve is always in communication a To all whom it may concern:

.Internal-Comhustibti Engines,

. ;This invention relates to unrru STATES PATENT OFFICE.

' JAMES MUBCHIE, es mama, :EHGLAND.

' CARBURETER.

'Be it known that 1, JAMES and usefullmprovements in Carbureters for of which the followingisa specificatiom i a an improved carbureter for internal combustion engines and has for its ob ect to provide a carbureter for use in connection vitliint'ernal combusmixture-for ,usein such engines can be readily obtained from eitherliglitor heavyhydro carbonoils or from a combinatiomofoils of rcterprovided with two float chamberscne qand maintained 1 under all coiulitions of 1 construction v and arr I 1 signed for elli fieuey i illustrated an exa -chambers such as together, in suitable proportions. features of importance compris'e means by-,- which. (a 1 suitable emper ture; is 1 produced g in theheavy oil'vaporizcr )a'd and thefgeneral ment' of parts dechnvenience in usei 'rriaxinium of flexibility: Iuthe accompanying' drawings I have?) diti'erent, specific gravity suchas petrol and for aiightjjandfthe otli'er jt'or' heavy oil and means for controlling the supply from these will enable either of the two. oils to be employed separately or} both Further municatinp; by meansiof a pipe of Warm air such as'another chamber 47 surrounding a hot part, of the heavy oil vaporp P and and to prrwule the 'iple' tit la carbureter conf y v i structed in accordance with my invention.

in sectionv of the carlmretei' as a whole. FIQL'QJS a plan view thereof.

Fig. 3 isavertical section of the heav y oil aporizing chamberjon line A.-B of Fig. 1.

.. I Fig. 4 is a sect ional "view through" the three v threenvay cock 3,1110

.Y Referring to these drawings :1. designates the'cxit -passi ze. from the can,

volition.

The hollow'p municationwith an extra air valve 5, which consistsof a spring'controlled piston 6 moving in a cylinder 7 provided with air ports-8 which are normally closed and gradually open as the suction of the engine increases n Specification of Letters Patent.

le'vel de vice;

l(' -is'pr'ov1d'ed with achamber 19 having per-.

heated by Figure 1 beingii n'elevational View partly a the numeral i which the oilfs lung 4 0i this cock 3 ,is in coin valves Patented rev. 20, 1917.

Application flied April 10, 1913. Serial No; 760,216.

; I intensity. The position of the cylinder 7 and- Muuci iu, of London, England, have invented certain new the relativeopcning of the air port or ports 8 is determincdby the positionfof a lever 9, so that the mixture can be controlled directlyiby the driver; In the arrangement shown the lever 9 rotates a casinglO and with it the sleeve 11 provided with apin 1'2 8 and 'fthe'piston 6 can. be adjusted (The with the inlet to the engine. H v

the petrolor lightoil carburetor 15 only is muse. This consists of an induction tube 16 plno'neposition of the three-way cock 3 i provided with. ,a eentral jet 17 communicatingavit h afloat chamber 18 or other constant The base of the-induction tube forations QOthrOugh which the air passes.

This chamber {acts asa vaporizer and is supplied withwarmJair from a jacket 51 comwith a source izer. :It wi-ll be seen that the pipe 52 is con '53 and 49 thereby insuring a rigid connection therebetw'een.- The'chamber 47is of course,

fromthe'hea'ting tube, With the result that air drawn into pipe .52 through channel 48, and chamber47, is heated,

means, of 1 the warm air passing- 1a a second positionof the three-Way cock 1 cl-the petroleum carburetor only is in use.

The. petroleum is supplied by means of'a floatchamber 21toajet'22 in an induction tube 23 which is inclined downward and dis charges into the upper part of a heated vaporizing'chamber 24. cAspring controlled valve 25 is provided at thehighest point in 23 and the jet '22 irom the induction tube drawn is adjustable by mcansof'a needle valve26. 'lhemixed air and petroleum are drawn into the aforesaid chamber'fl t which surrounds the upper part of the vaporizertube 27 through which the exhaust gases i of the engine pass.

in the these holes the mixture passes into an annular chamber 30 surrounding the vaporizer This a chamber 24 is provided with additional air' 28. A numberof holes 29 are made base of; this chamber and through tube 27. The surface of this annular chamber is provided with ribs orprojections 31 of suitable'shape to give a largeheating surface and to induce a thorough mixing of the 5 vapdr and air. A sleeve or curtain '32 of metal is provided in the annular chamber: 30, so that the mixture after passing over the hot inner surface, rises outsldethe sleeve 32 (leaving any unvaporized oil behind) and enters the three-way cock 3 by means of an opening 33 in the'side of the annular chamber. A cock 34 is provided on the side of the annular chamber for the removal of any unvaporized oil. i

The heating tube 27 through which the" exhaust gases pass is for the most part vertical, and is provided with two openings at the top and three at its base. One. of the open- ;ings 35 at the top is for connection with the exhaust of the engine, and the other 36 is provided with a cap 3?,which'is removed when the blow lamp is used for initial heating and provides an exit for its products of combustion. Of the three openings at the base 38, one is connected to the silencerof the engine, the second 39 is the opening into which the flame of the blow lamp is directed when it is desired to start up on the heavy oil. The third opening 40 is only of use when heated air is supplied to-the petrol vaporizer the heating device beingin this case connected to the said opening. -ribs or projections 41 are provided on the inside of this vaporizer tube 27 to give greater heating surface and increase the 00-. eilicient of heat transmission. In the center of this tube a hollow metal conical valve 42, is supported in a vertical position and controlled by a spring 48'and dash pot 44 moves the .valve i2 upwardly with the result that the enlarged portion thereof engages the inclined walls of the tube 27 whichforms the seat for the valve 42 and closes the vaporizer when the engine stops. It will, of course, beseen that the valve opens againby the pressure of the exhaust gases thus adjusting the size of the openin through the heating tube to the volume 0 the exhaust gases and maintaining and conserving the heat of the vaporizer. It is well known. that the coefficient of heat transmission is a function of the velocity of the heating fluid and increases as this velocity increases, and, since also, this arrangement scrubs the metal surfaces, the etliciency of the apparatus is very high. The hollow conical valve 42' is filled with aluminum filings whose high specific heat and low conductivity still further helps to maintain the temperature of the vaporizer. y The needle valve 26 of the jet 22 and the air valve 28 are adjusted when running on petroleum, so that under all conditions of naaaaea heavy oil vaporizer may I gins.

from to provide a fuel passageway, said loading the extra air valve as formerly ad-' justed gives a correct mixture at all speeds. Under these circumstances the three-way cock 3 maybe placed in such a position as to put the engine into communication with both the petrol carburetor and the heavy oil va orizer at the same time. p v

.I he use of the light oil enables the en gine to start from cold and to change over to heavy oil after the vaporizer for heavy oil has become hot. I

In the absence of light oil however the be initially heated with a blow lamp through theopening provided, as aforesaid before starting the en- '2 What I claim and desire to secure by Letters Patentisz V x 1. In a carburetor,a casing having an intake port, a vaporizin chamber formed by the casing, a'heating tu e extending into the vaporizing chamber and being spaced therevaporizing chamber having openings adjacent the upper extremities thereof to allow fuel to'pass to-the fuel passageway, means supported within the fuel passageway fordividing the same into an outer and inner compartment, said means terminating short of the length of the hinting tube, ribs on the heating tube for providing fuel passageways,'and said casing having an opening to 9 allow heated fuel to pass therethrough 2. In a carbureter,

a casing having an 1ntake port, a vaporizing chamber formed by the casing, a heatin tube extending into the vaporizing sham er, said heating tube 1 being spaced from the walls of the casing to form a fuel passageway, said vaporizing chamber having openings to allow fuel to pass to the fuel passageway, a sleeve supported in the fuel passageway for dividing the same into an outer and inner compartment, and said casing having an opening to permit vaporized fuel to pass therefrom.

3. In a carbureter, a casing having an intake port, a vaporizing chamber in the cas ing, a heating tube spaced from the walls of the casing to form a fuel passage-way, substantially vertical ribs provided on the heating tube, means ext nding into the fuel passage-way and coiiperating with the ribs for forming independent fuel passage-ways, and said vaporizing chamber having openings to permit fuel to flow therefrom to the independent fuel passage-ways.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES Mnno m.

Witnesses G. T. W. CLIFFQRD, a Q. J. Won'rn. 

